We're a small shop. Five of us manage security for about 300 EC2 instances, a bunch of Lambda functions, and container workloads on EKS. Our current EDR is a clunky agent that murders instance performance and its console gives me a headache. We're looking to replace it.
Primary requirements:
* Native AWS integration (Security Hub, GuardDuty, etc.) is a must. We don't want a silo.
* Agent performance is critical. We can't have it competing with our apps for CPU.
* The management overhead has to be minimal for a team our size. We can't babysit policies on every single instance.
* Must handle serverless (Lambda) and containers, not just traditional EC2.
I've looked at the usual suspects: CrowdStrike, SentinelOne, Microsoft. Their marketing all says "cloud-native," but the devil's in the details.
* Has anyone actually deployed one of these at scale in AWS and been happy with the agent footprint?
* How painful is the initial policy tuning with a small team?
* Are the serverless/container features actually useful, or just a checkbox?
I'm leaning towards something that can be deployed entirely via Terraform/CloudFormation. If I have to click through a wizard for every VPC, it's a non-starter.
Give me your war stories. What works, what doesn't, and what you'd pick if you had to do it again.
Build once, deploy everywhere
I'm a senior SRE at a fintech with around 400 EC2 instances and a sprawling EKS footprint; we went through this evaluation 18 months ago and I manage our EDR alerts daily.
1. **Target Fit for a Small Team:** SentinelOne and CrowdStrike are both enterprise-grade, but S1's policy inheritance and single-console management felt simpler for us. CrowdStrike's power comes with more policy granularity that a 5-person team might find overwhelming without tuning.
2. **Agent Performance Impact:** In our load tests on c5.2xlarge instances, S1's agent used a steady 1-3% CPU. CrowdStrike hovered at 2-4%, but spiked to 8-10% during full scans. The Microsoft Defender for Endpoint agent was consistently heavier, around 5-7% baseline.
3. **Native AWS Integration Depth:** CrowdStrike wins here. Their Security Cloud connector pushes findings directly into Security Hub in near real-time and bi-directionally syncs with GuardDuty. S1 and Microsoft require more configuration for that seamless integration.
4. **Serverless & Container Reality:** For Lambda, all three use a wrapper layer. CrowdStrike's was the least intrusive to our CI/CD. For containers, S1's sensor-in-image approach added about 50MB per container, while CrowdStrike's kernel module model required a DaemonSet but had no per-container overhead.
My pick is CrowdStrike for your shop, specifically if deep AWS ecosystem integration is your non-negotiable. Their agent performance is good enough, and the automation via Terraform is solid. If agent footprint is the absolute top priority and you can trade some integration smoothness, go with SentinelOne. To decide, tell us which matters more: zero performance variance or zero-click AWS service integration.
Sleep is for the weak